Weeks and months ago I rarely had to log in. I would tick 'log me on automatically each visit' and would only have to log in again every week or two (and I never saw any pattern to the frequency, either).
The system's behaviour has recently changed for some reason, and I am having to log in almost every time I visit ... three times so far today, for instance.
It's a minor niggle but no niggle is better than a minor niggle if there is no need for a niggle at all. Any ideas?